Color preferences aside, the white ceramic has a tendency to discolor after prolonged use and does not maintain the ceramic mirror luster for too long. The black J12s however seem to hold up well against discoloration.
I just bought the black w/diamond markers in 33m. I LOVE IT!! Wear it everyday. However, I wear a lot of black and have very little color in my wardrobe so it suits me perfectly. The white is beautiful though. Good luck.